KX-NS500RU, KX-NS500UC - Panasonic PBX Service Manual Supplement (repair manual). Page 2

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Suffix

Reason for suffix change

W to X

Software version up.(V004.60012 -> V005.00112)

X to Y

Software version up.(V005.00112 -> V006.01079)

Y to Z

For quality improvement.

Suffix

Reason for suffix change

R to S

Software version up.(V004.60012 -> V005.00112)

S to T

For quality improvement.

Suffix

Reason for suffix change

S to T

Software version up.(V004.60012 -> V005.00112)

T to U

Software version up.(V005.00112 -> V006.01079)

U to V

For quality improvement.

Suffix

Reason for suffix change

X to Y

Software version up.(V004.60012 -> V005.00112)

Y to Z

Software version up.(V005.00112 -> V006.01079)

Z to A

For quality improvement.

4 1

8 0

4 0

1

REF2

3

5

7

PNLB2260W*-YY

R435

C401

R249

C212

C214

R250

R255

R256

R257

R258

R259

R260

R261

R262

R263

R264

R265

R266

R267

TP_CLK_16.384MHz

IC401

C338

C349

C350

R391

R392

R393

R394

T301

TP_DG2

TP_DG3

TP_DG4

NS3XX

NS7XX

NS5XX

If the part number of the CPU PCB Board is after the following number, the suffix will be Z (KX-NS500BX, 
KX-NS500BR, KX-NS500LA, KX-NS500NE, KX-NS500SA, KX-NS500SU), T (KX-NS500RU, KX-NS500UC),
V (KX-NS500AG), A (KX-NS500UE) ,or later.  When servicing, you need to check the suffix.

Refer to “PNLB2260W”

(Example)

Serial No.
Label

Suffix Q - A

2HAQA123456